package com.example.yskjproject.utils;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Formatter;
import java.util.Locale;

import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;

/**
 * Log工具，类似android.util.Log。 tag自动产生，格式:
 * customTagPrefix:className.methodName(Line:lineNumber),
 * customTagPrefix为空时只输出：className.methodName(Line:lineNumber)。
 */
public class LogUtils {

 public static String customTagPrefix = "finddreams"; // 自定义Tag的前缀，可以是作者名
 private static final boolean isSaveLog = false; // 是否把保存日志到SD卡中
 public static final String ROOT = Environment.getExternalStorageDirectory()
   .getPath() + "/finddreams/"; // SD卡中的根目录
 private static final String PATH_LOG_INFO = ROOT + "info/";

 private LogUtils() {
 }

 // 容许打印日志的类型，默认是true，设置为false则不打印
 public static boolean allowD = true;
 public static boolean allowE = true;
 public static boolean allowI = true;
 public static boolean allowV = true;
 public static boolean allowW = true;
 public static boolean allowWtf = true;

 private static String generateTag(StackTraceElement caller) {
  String tag = "%s.%s(Line:%d)"; // 占位符
  String callerClazzName = caller.getClassName(); // 获取到类名
  callerClazzName = callerClazzName.substring(callerClazzName
    .lastIndexOf(".") + 1);
  tag = String.format(tag, callerClazzName, caller.getMethodName(),
    caller.getLineNumber()); // 替换
  tag = TextUtils.isEmpty(customTagPrefix) ? tag : customTagPrefix + ":"
    + tag;
  return tag;
 }

 /**
  * 自定义的logger
  */
 public static CustomLogger customLogger;

 public interface CustomLogger {
  void d(String tag, String content);

  void d(String tag, String content, Throwable tr);

  void e(String tag, String content);

  void e(String tag, String content, Throwable tr);

  void i(String tag, String content);

  void i(String tag, String content, Throwable tr);

  void v(String tag, String content);

  void v(String tag, String content, Throwable tr);

  void w(String tag, String content);

  void w(String tag, String content, Throwable tr);

  void w(String tag, Throwable tr);

  void wtf(String tag, String content);

  void wtf(String tag, String content, Throwable tr);

  void wtf(String tag, Throwable tr);
 }

 public static void d(String content) {
  if (!allowD)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.d(tag, content);
  } else {
   Log.d(tag, content);
  }
 }

 public static void d(String content, Throwable tr) {
  if (!allowD)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.d(tag, content, tr);
  } else {
   Log.d(tag, content, tr);
  }
 }

 public static void e(String content) {
  if (!allowE)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.e(tag, content);
  } else {
   Log.e(tag, content);
  }
  if (isSaveLog) {
   point(PATH_LOG_INFO, tag, content);
  }
 }

 public static void e(String content, Throwable tr) {
  if (!allowE)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.e(tag, content, tr);
  } else {
   Log.e(tag, content, tr);
  }
  if (isSaveLog) {
   point(PATH_LOG_INFO, tag, tr.getMessage());
  }
 }

 public static void i(String content) {
  if (!allowI)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.i(tag, content);
  } else {
   Log.i(tag, content);
  }

 }

 public static void i(String content, Throwable tr) {
  if (!allowI)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.i(tag, content, tr);
  } else {
   Log.i(tag, content, tr);
  }

 }

 public static void v(String content) {
  if (!allowV)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.v(tag, content);
  } else {
   Log.v(tag, content);
  }
 }

 public static void v(String content, Throwable tr) {
  if (!allowV)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.v(tag, content, tr);
  } else {
   Log.v(tag, content, tr);
  }
 }

 public static void w(String content) {
  if (!allowW)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.w(tag, content);
  } else {
   Log.w(tag, content);
  }
 }

 public static void w(String content, Throwable tr) {
  if (!allowW)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.w(tag, content, tr);
  } else {
   Log.w(tag, content, tr);
  }
 }

 public static void w(Throwable tr) {
  if (!allowW)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.w(tag, tr);
  } else {
   Log.w(tag, tr);
  }
 }

 public static void wtf(String content) {
  if (!allowWtf)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.wtf(tag, content);
  } else {
   Log.wtf(tag, content);
  }
 }

 public static void wtf(String content, Throwable tr) {
  if (!allowWtf)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.wtf(tag, content, tr);
  } else {
   Log.wtf(tag, content, tr);
  }
 }

 public static void wtf(Throwable tr) {
  if (!allowWtf)
   return;
  StackTraceElement caller = getCallerStackTraceElement();
  String tag = generateTag(caller);

  if (customLogger != null) {
   customLogger.wtf(tag, tr);
  } else {
   Log.wtf(tag, tr);
  }
 }

 private static StackTraceElement getCallerStackTraceElement() {
  return Thread.currentThread().getStackTrace()[4];
 }

 public static void point(String path, String tag, String msg) {
  if (isSDAva()) {
   Date date = new Date();
   SimpleDateFormat dateFormat = new SimpleDateFormat("",
     Locale.SIMPLIFIED_CHINESE);
   dateFormat.applyPattern("yyyy");
   path = path + dateFormat.format(date) + "/";
   dateFormat.applyPattern("MM");
   path += dateFormat.format(date) + "/";
   dateFormat.applyPattern("dd");
   path += dateFormat.format(date) + ".log";
   dateFormat.applyPattern("[yyyy-MM-dd HH:mm:ss]");
   String time = dateFormat.format(date);
   File file = new File(path);
   if (!file.exists())
    createDipPath(path);
   BufferedWriter out = null;
   try {
    out = new BufferedWriter(new OutputStreamWriter(
      new FileOutputStream(file, true)));
    out.write(time + " " + tag + " " + msg + "\r\n");
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (out != null) {
      out.close();
     }
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }

 /**
  * 根据文件路径 递归创建文件
  * 
  * @param file
  */
 public static void createDipPath(String file) {
  String parentFile = file.substring(0, file.lastIndexOf("/"));
  File file1 = new File(file);
  File parent = new File(parentFile);
  if (!file1.exists()) {
   parent.mkdirs();
   try {
    file1.createNewFile();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
 }

 /**
  * A little trick to reuse a formatter in the same thread
  */
 private static class ReusableFormatter {

  private Formatter formatter;
  private StringBuilder builder;

  public ReusableFormatter() {
   builder = new StringBuilder();
   formatter = new Formatter(builder);
  }

  public String format(String msg, Object... args) {
   formatter.format(msg, args);
   String s = builder.toString();
   builder.setLength(0);
   return s;
  }
 }

 private static final ThreadLocal<ReusableFormatter> thread_local_formatter = new ThreadLocal<ReusableFormatter>() {
  protected ReusableFormatter initialValue() {
   return new ReusableFormatter();
  }
 };

 public static String format(String msg, Object... args) {
  ReusableFormatter formatter = thread_local_formatter.get();
  return formatter.format(msg, args);
 }

 public static boolean isSDAva() {
  if (Environment.getExternalStorageState().equals(
    Environment.MEDIA_MOUNTED)
    || Environment.getExternalStorageDirectory().exists()) {
   return true;
  } else {
   return false;
  }
 }
}
